plugins/imager/loop_plugin.py

   1 #!/usr/bin/python -tt
   2 #
   3 # Copyright (c) 2011 Intel, Inc.
   4 #
   5 # This program is free software; you can redistribute it and/or modify it
   6 # under the terms of the GNU General Public License as published by the Free
   7 # Software Foundation; version 2 of the License
   8 #
   9 # This program is distributed in the hope that it will be useful, but
  10 # WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  11 # or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12 # for more details.
  13 #
  14 # You should have received a copy of the GNU General Public License along
  15 # with this program; if not, write to the Free Software Foundation, Inc., 59
  16 # Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  17
  18 import os
  19 import shutil
  20 import tempfile
  21
  22 from mic import chroot, msger, rt_util
  23 from mic.utils import misc, fs_related, errors, cmdln
  24 from mic.conf import configmgr
  25 from mic.plugin import pluginmgr
  26 from mic.imager.loop import LoopImageCreator, load_mountpoints
  27
  28 from mic.pluginbase import ImagerPlugin
  29 class LoopPlugin(ImagerPlugin):
  30     name = 'loop'
  31
  32     @classmethod
  33     @cmdln.option("--compress-disk-image", dest="compress_image",
  34                   type='choice', choices=("gz", "bz2"), default=None,
  35                   help="Same with --compress-image")
  36                   # alias to compress-image for compatibility
  37     @cmdln.option("--compress-image", dest="compress_image",
  38                   type='choice', choices=("gz", "bz2"), default=None,
  39                   help="Compress all loop images wiht 'gz' or 'bz2'")
  40     @cmdln.option("--shrink", action='store_true', default=False,
  41                   help="Whether to shrink loop images to minimal size")
  42     def do_create(self, subcmd, opts, *args):
  43         """${cmd_name}: create loop image
  44
  45         Usage:
  46             ${name} ${cmd_name} <ksfile> [OPTS]
  47
  48         ${cmd_option_list}
  49         """
  50
  51         if not args:
  52             raise errors.Usage("need one argument as the path of ks file")
  53
  54         if len(args) != 1:
  55             raise errors.Usage("Extra arguments given")
  56
  57         creatoropts = configmgr.create
  58         ksconf = args[0]
  59
  60         if not os.path.exists(ksconf):
  61             raise errors.CreatorError("Can't find the file: %s" % ksconf)
  62
  63         recording_pkgs = []
  64         if len(creatoropts['record_pkgs']) > 0:
  65             recording_pkgs = creatoropts['record_pkgs']
  66
  67         if creatoropts['release'] is not None:
  68             if 'name' not in recording_pkgs:
  69                 recording_pkgs.append('name')
  70
  71         ksconf = misc.normalize_ksfile(ksconf,
  72                                        creatoropts['release'],
  73                                        creatoropts['arch'])
  74         configmgr._ksconf = ksconf
  75
  76         # Called After setting the configmgr._ksconf
  77         # as the creatoropts['name'] is reset there.
  78         if creatoropts['release'] is not None:
  79             creatoropts['outdir'] = "%s/%s/images/%s/" % (creatoropts['outdir'],
  80                                                           creatoropts['release'],
  81                                                           creatoropts['name'])
  82
  83         # try to find the pkgmgr
  84         pkgmgr = None
  85         for (key, pcls) in pluginmgr.get_plugins('backend').iteritems():
  86             if key == creatoropts['pkgmgr']:
  87                 pkgmgr = pcls
  88                 break
  89
  90         if not pkgmgr:
  91             pkgmgrs = pluginmgr.get_plugins('backend').keys()
  92             raise errors.CreatorError("Can't find package manager: %s "
  93                                       "(availables: %s)" \
  94                                       % (creatoropts['pkgmgr'],
  95                                          ', '.join(pkgmgrs)))
  96
  97         if creatoropts['runtime']:
  98             rt_util.runmic_in_runtime(creatoropts['runtime'], creatoropts, ksconf, None)
  99
 100         creator = LoopImageCreator(creatoropts,
 101                                    pkgmgr,
 102                                    opts.compress_image,
 103                                    opts.shrink)
 104
 105         if len(recording_pkgs) > 0:
 106             creator._recording_pkgs = recording_pkgs
 107
 108         self.check_image_exists(creator.destdir,
 109                                 creator.pack_to,
 110                                 [creator.name + ".img"],
 111                                 creatoropts['release'])
 112
 113         try:
 114             creator.check_depend_tools()
 115             creator.mount(None, creatoropts["cachedir"])
 116             creator.install()
 117             creator.configure(creatoropts["repomd"])
 118             creator.copy_kernel()
 119             creator.unmount()
 120             creator.package(creatoropts["outdir"])
 121
 122             if creatoropts['release'] is not None:
 123                 creator.release_output(ksconf,
 124                                        creatoropts['outdir'],
 125                                        creatoropts['release'])
 126             creator.print_outimage_info()
 127
 128         except errors.CreatorError:
 129             raise
 130         finally:
 131             creator.cleanup()
 132
 133         msger.info("Finished.")
 134         return 0
 135
 136     @classmethod
 137     def _do_chroot_tar(cls, target):
 138         mountfp_xml = os.path.splitext(target)[0] + '.xml'
 139         if not os.path.exists(mountfp_xml):
 140             raise errors.CreatorError("No mount point file found for this tar "
 141                                       "image, please check %s" % mountfp_xml)
 142
 143         import tarfile
 144         tar = tarfile.open(target, 'r')
 145         tmpdir = misc.mkdtemp()
 146         tar.extractall(path=tmpdir)
 147         tar.close()
 148
 149         mntdir = misc.mkdtemp()
 150
 151         loops = []
 152         for (mp, label, name, size, fstype) in load_mountpoints(mountfp_xml):
 153             if fstype in ("ext2", "ext3", "ext4"):
 154                 myDiskMount = fs_related.ExtDiskMount
 155             elif fstype == "btrfs":
 156                 myDiskMount = fs_related.BtrfsDiskMount
 157             elif fstype in ("vfat", "msdos"):
 158                 myDiskMount = fs_related.VfatDiskMount
 159             else:
 160                 msger.error("Cannot support fstype: %s" % fstype)
 161
 162             name = os.path.join(tmpdir, name)
 163             size = size * 1024L * 1024L
 164             loop = myDiskMount(fs_related.SparseLoopbackDisk(name, size),
 165                                os.path.join(mntdir, mp.lstrip('/')),
 166                                fstype, size, label)
 167
 168             try:
 169                 msger.verbose("Mount %s to %s" % (mp, mntdir + mp))
 170                 fs_related.makedirs(os.path.join(mntdir, mp.lstrip('/')))
 171                 loop.mount()
 172
 173             except:
 174                 loop.cleanup()
 175                 for lp in reversed(loops):
 176                     chroot.cleanup_after_chroot("img", lp, None, mntdir)
 177
 178                 shutil.rmtree(tmpdir, ignore_errors=True)
 179                 raise
 180
 181             loops.append(loop)
 182
 183         try:
 184             chroot.chroot(mntdir, None, "/usr/bin/env HOME=/root /bin/bash")
 185         except:
 186             raise errors.CreatorError("Failed to chroot to %s." % target)
 187         finally:
 188             for loop in reversed(loops):
 189                 chroot.cleanup_after_chroot("img", loop, None, mntdir)
 190
 191             shutil.rmtree(tmpdir, ignore_errors=True)
 192
 193     @classmethod
 194     def do_chroot(cls, target):
 195         if target.endswith('.tar'):
 196             import tarfile
 197             if tarfile.is_tarfile(target):
 198                 LoopPlugin._do_chroot_tar(target)
 199                 return
 200             else:
 201                 raise errors.CreatorError("damaged tarball for loop images")
 202
 203         img = target
 204         imgsize = misc.get_file_size(img) * 1024L * 1024L
 205         imgtype = misc.get_image_type(img)
 206         if imgtype == "btrfsimg":
 207             fstype = "btrfs"
 208             myDiskMount = fs_related.BtrfsDiskMount
 209         elif imgtype in ("ext3fsimg", "ext4fsimg"):
 210             fstype = imgtype[:4]
 211             myDiskMount = fs_related.ExtDiskMount
 212         else:
 213             raise errors.CreatorError("Unsupported filesystem type: %s" \
 214                                       % imgtype)
 215
 216         extmnt = misc.mkdtemp()
 217         extloop = myDiskMount(fs_related.SparseLoopbackDisk(img, imgsize),
 218                                                          extmnt,
 219                                                          fstype,
 220                                                          4096,
 221                                                          "%s label" % fstype)
 222         try:
 223             extloop.mount()
 224
 225         except errors.MountError:
 226             extloop.cleanup()
 227             shutil.rmtree(extmnt, ignore_errors=True)
 228             raise
 229
 230         try:
 231             envcmd = fs_related.find_binary_inchroot("env", extmnt)
 232             if envcmd:
 233                 cmdline = "%s HOME=/root /bin/bash" % envcmd
 234             else:
 235                 cmdline = "/bin/bash"
 236             chroot.chroot(extmnt, None, cmdline)
 237         except:
 238             raise errors.CreatorError("Failed to chroot to %s." % img)
 239         finally:
 240             chroot.cleanup_after_chroot("img", extloop, None, extmnt)
 241
 242     @classmethod
 243     def do_unpack(cls, srcimg):
 244         image = os.path.join(tempfile.mkdtemp(dir="/var/tmp", prefix="tmp"),
 245                              "target.img")
 246         msger.info("Copying file system ...")
 247         shutil.copyfile(srcimg, image)
 248         return image